3 phase 380V to 220V isolation transformer is 50/60 Hz rated, available with aluminium/copper wire winding material, the effective performance and high quality features make it ideal for use in the electrical and the engineering industries.

ATOSG-60KVA isolation transformers is 50/60 Hz rated, step down 3 phase 480V AC to 3 phase 220V or step up 220V to 480V type is available, and come in a IP 22 enclosure for indoor use as well as outdoor protection against rain and sleet.

Three phase isolation transformer with 80 kVA capacity and a primary voltage of 480V (240V) AC on the primary side, and secondary voltage of 380/220V AC on the secondary side. The lower operating costs, lower heat emissions make this transformer ideal for a wide range of applications.

Note:Transformer can only convert voltage and CANNOT convert frequency.Transformer CANNOT convert single phase voltage to 3 phase voltage.Input/output voltage, power rating and whether with shell of all transformers, can be customized according to clients' requirements.3 phase Isolation Transformer Wiring Method

150 kVA Isolation Transformer Dimension

Aluminium Wire Transformer Size

Copper Wire Transformer Size

Open type: a*b*c=820*400*800mm

Open type: a*b*c=860*400*700mm

Protected type: A*B*C=1050*600*1560mm (Including an alarm)

Protected type: A*B*C=1050*600*1560mm (Including an alarm)

Installation Dimenion: D*E=500*350mm

Installation Dimenion: D*E=500*350mm

Tips: Difference between isolation transformer and voltage regulatorAs we known, electricity is capable of generating a magnetic field that is also converted into electricity. The principle of single phase or three phase isolation transformer refers that a coil charged with alternating current generates an alternating magnetic field and this alternating magnetic field passes through another coil where voltage will be induced. The transformer ratio is related to the number of these two windings. In brief, under the principle of magnetic coupling, transformer is made of original edging windings and the voltage of both coil ends is directly proportional to the number of windings. Therefore, the transformer ratio is determined by the number of original edging windings.

It is obvious that transformer is not a voltage regulator, because the auxiliary edging voltage changes with the original edging voltage.

Voltage regulator follows the principle of negative feedback. For example, turn on the tap to half and install a sensor at the exit of tap to detect the amount of water. If the amount of water is too large, the tap will be triggered to turn down automatically. On the contrary, if the amount of water is too small, the amount of water will be triggered to turn up automatically till a constant water flow. The principle of voltage regulator is as follows: There is an error amplifier inverting input divider resistance sampling circuit that can detect the changes of output voltage can be compressed into an integrated chip in the regulator. When the output voltage changes, the feedback on the circuit detected with voltage changes will be provided to the private service motor by the chip and the automatic adjustment of electric brush position will be activated by the pivoted arm triggered by a private service motor in order to stabilize the output voltage, which is the simplest voltage regulator.

Need more detail of ATO isolation transformer? Here is a good explanation about it in this video. To test the accuracy of the transformer voltage, we take a 3000 VA single phase 220V iuput to 110V output isolation transformer as an example.